/[escript]/trunk/finley/src/Mesh_resolveNodeIds.c
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Contents of /trunk/finley/src/Mesh_resolveNodeIds.c

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Revision 2385 - (show annotations)
Wed Apr 15 03:52:38 2009 UTC (10 years, 5 months ago) by gross
File MIME type: text/plain
File size: 5330 byte(s)
two fixes dealing with zero samples under MPI
1
2 /*******************************************************
3 *
4 * Copyright (c) 2003-2008 by University of Queensland
5 * Earth Systems Science Computational Center (ESSCC)
6 * http://www.uq.edu.au/esscc
7 *
8 * Primary Business: Queensland, Australia
9 * Licensed under the Open Software License version 3.0
10 * http://www.opensource.org/licenses/osl-3.0.php
11 *
12 *******************************************************/
13
14
15 /**************************************************************/
16
17 /* Finley: Mesh */
18
19 /* at input the element nodes refers to the numbering defined the global Id assigned to the nodes in the */
20 /* NodeFile. It is also not ensured that all nodes refered by an element is actually available */
21 /* on the process. At the output, a local node labeling is used and all nodes are available */
22 /* In particular the numbering of the element nodes is between 0 and in->NodeFile->numNodes */
23 /* The function does not create a distribution of the degrees of freedom. */
24
25 /**************************************************************/
26
27 #include "Mesh.h"
28 #include "Util.h"
29
30 /**************************************************************/
31
32 void Finley_Mesh_resolveNodeIds(Finley_Mesh* in) {
33
34 index_t min_id, max_id, min_id2, max_id2, global_min_id, global_max_id,
35 *globalToNewLocalNodeLabels=NULL, *newLocalToGlobalNodeLabels=NULL;
36 dim_t len, n, newNumNodes, numDim;
37 Finley_NodeFile *newNodeFile=NULL;
38 #ifdef PASO_MPI
39 index_t id_range[2], global_id_range[2];
40 #endif
41 numDim=Finley_Mesh_getDim(in);
42 /* find the minimum and maximum id used by elements: */
43 min_id=INDEX_T_MAX;
44 max_id=-INDEX_T_MAX;
45 Finley_ElementFile_setNodeRange(&min_id2,&max_id2,in->Elements);
46 max_id=MAX(max_id,max_id2);
47 min_id=MIN(min_id,min_id2);
48 Finley_ElementFile_setNodeRange(&min_id2,&max_id2,in->FaceElements);
49 max_id=MAX(max_id,max_id2);
50 min_id=MIN(min_id,min_id2);
51 Finley_ElementFile_setNodeRange(&min_id2,&max_id2,in->ContactElements);
52 max_id=MAX(max_id,max_id2);
53 min_id=MIN(min_id,min_id2);
54 Finley_ElementFile_setNodeRange(&min_id2,&max_id2,in->Points);
55 max_id=MAX(max_id,max_id2);
56 min_id=MIN(min_id,min_id2);
57 #ifdef PASO_MPI
58 id_range[0]=-min_id;
59 id_range[1]=max_id;
60 MPI_Allreduce( id_range, global_id_range, 2, MPI_INT, MPI_MAX, in->MPIInfo->comm );
61 global_min_id=-global_id_range[0];
62 global_max_id=global_id_range[1];
63 #else
64 global_min_id=min_id;
65 global_max_id=max_id;
66 #endif
67 #ifdef Finley_TRACE
68 printf("Node id range used by elements is %d:%d\n",global_min_id,global_max_id);
69 #endif
70 if (min_id>max_id) {
71 max_id=-1;
72 min_id=0;
73 }
74
75 /* allocate mappings for new local node labeling to global node labeling (newLocalToGlobalNodeLabels)
76 and global node labeling to the new local node labeling (globalToNewLocalNodeLabels[i-min_id] is the
77 new local id of global node i) */
78 len=(max_id>=min_id) ? max_id-min_id+1 : 0 ;
79 globalToNewLocalNodeLabels=TMPMEMALLOC(len,index_t); /* local mask for used nodes */
80 newLocalToGlobalNodeLabels=TMPMEMALLOC(len,index_t);
81 if (! ( (Finley_checkPtr(globalToNewLocalNodeLabels) && Finley_checkPtr(newLocalToGlobalNodeLabels) ) ) ) {
82
83 #pragma omp parallel
84 {
85 #pragma omp for private(n) schedule(static)
86 for (n=0;n<len;n++) newLocalToGlobalNodeLabels[n]=-1;
87 #pragma omp for private(n) schedule(static)
88 for (n=0;n<len;n++) globalToNewLocalNodeLabels[n]=-1;
89 }
90
91 /* mark the nodes referred by elements in globalToNewLocalNodeLabels which is currently used as a mask: */
92 Finley_Mesh_markNodes(globalToNewLocalNodeLabels,min_id,in,FALSE);
93
94 /* create a local labeling newLocalToGlobalNodeLabels of the local nodes by packing the mask globalToNewLocalNodeLabels*/
95
96 newNumNodes=Finley_Util_packMask(len,globalToNewLocalNodeLabels,newLocalToGlobalNodeLabels);
97
98 /* invert the new labeling and shift the index newLocalToGlobalNodeLabels to global node ids */
99 #pragma omp parallel for private(n) schedule(static)
100 for (n=0;n<newNumNodes;n++) {
101 #ifdef BOUNDS_CHECK
102 if (n >= len || n < 0) { printf("BOUNDS_CHECK %s %d n=%d\n", __FILE__, __LINE__, n); exit(1); }
103 if (newLocalToGlobalNodeLabels[n] >= len || newLocalToGlobalNodeLabels[n] < 0) { printf("BOUNDS_CHECK %s %d n=%d\n", __FILE__, __LINE__, n); exit(1); }
104 #endif
105 globalToNewLocalNodeLabels[newLocalToGlobalNodeLabels[n]]=n;
106 newLocalToGlobalNodeLabels[n]+=min_id;
107 }
108 /* create a new table */
109 newNodeFile=Finley_NodeFile_alloc(numDim,in->MPIInfo);
110 if (Finley_noError()) {
111 Finley_NodeFile_allocTable(newNodeFile,newNumNodes);
112 }
113 if (Finley_noError()) {
114 Finley_NodeFile_gather_global(newLocalToGlobalNodeLabels,in->Nodes, newNodeFile);
115 }
116 if (Finley_noError()) {
117 Finley_NodeFile_free(in->Nodes);
118 in->Nodes=newNodeFile;
119 /* relable nodes of the elements: */
120 Finley_Mesh_relableElementNodes(globalToNewLocalNodeLabels,min_id,in);
121 }
122 }
123 TMPMEMFREE(globalToNewLocalNodeLabels);
124 TMPMEMFREE(newLocalToGlobalNodeLabels);
125 if (! Finley_noError()) {
126 Finley_NodeFile_free(newNodeFile);
127 }
128 }

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